64251330 has 128 divisors (see below), whose sum is σ = 192036096. Its totient is φ = 13516800.

The previous prime is 64251311. The next prime is 64251337. The reversal of 64251330 is 3315246.

It is a happy number.

64251330 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a self number, because there is not a number n which added to its sum of digits gives 64251330.

It is not an unprimeable number, because it can be changed into a prime (64251337) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 72490 + ... + 73370.

It is an arithmetic number, because the mean of its divisors is an integer number (1500282).

Almost surely, 2^64251330 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 64251330, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (96018048).

64251330 is an abundant number, since it is smaller than the sum of its proper divisors (127784766).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

64251330 is a wasteful number, since it uses less digits than its factorization.

64251330 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 932.

The product of its (nonzero) digits is 2160, while the sum is 24.

The square root of 64251330 is about 8015.6927336319. The cubic root of 64251330 is about 400.5229202548.

Adding to 64251330 its reverse (3315246), we get a palindrome (67566576).

The spelling of 64251330 in words is "sixty-four million, two hundred fifty-one thousand, three hundred thirty".